Michelle Obama speaks

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Former first lady Michelle Obama participates in a discussion with former White House chef and senior policy adviser for nutrition policy Sam Kass during the Partnership for a Healthier America summit May 12, 2017, in Washington.

Former first lady Michelle Obama participates in a discussion with former White House chef and senior policy adviser for nutrition policy Sam Kass during the Partnership for a Healthier America summit May 12, 2017, in Washington.

Former first lady Michelle Obama waves as former White House chef and senior policy adviser for nutrition policy Sam Kass watches during the Partnership for a Healthier America summit May 12, 2017, in Washington.

Former first lady Michelle Obama waves as former White House chef and senior policy adviser for nutrition policy Sam Kass watches during the Partnership for a Healthier America summit May 12, 2017, in Washington.